Air-mover.



A. MATHIS.

AIR MOVER.

APPLIOATION FILED FEB. 11, 1909.

Patented July 20, 1909.

UNITED snares PATENT OFFICE.

AUGUST MATHIS, OF CHICAGO, ILLINOIS, ASSIGNOR TO MATHIS BROTHERSCOMPANY, A CORPORATION OF INDIANA.

AIR-MOVER.

No. 928,775. Specification of Application filed February 11,1909. SerialNo. 477,416.

T 0 all whom it may concern:

Be it known that I, AUGUST IVIATHIS, a citizen of the United States ofAmerica, and a resident of Chicago, in the county of Cook and State ofIllinois, have invented certain new and useful Improvements in Air-Movers, of which the following is a specification.

This invention relates to that class of centrifugal air movers in whicha centrally supplied head carrying a series of radial hollow arms andmoving in a fluid medium produces the required movement of the air witha corresponding exhaustion at one end, or a pressure at the other end inaccordance with the particular application of the apparatus. And thepresent improvement has for its object to provide a durable andefl'icient structural arrangement and combination of parts adapted tomove a large volume of air with a minimum expenditure of power, and withwhich the vortex movement of the fluid medium in which the mechanismworks is materially reduced with a consequent increase in the efficiencyof the apparatus, all as will hereinafter more fully appear.

In the accompanying drawings :-F igure 1, is a central vertical sectionon line w0c, Fig. 3. Fig. 2, is a horizontal section on line aex,Fig. 1. Fig. 3, is a similar view on line w w Fig. 1. Fig. 4, is adetail transverse section on line w a: Fig. 3, of one of the hollowtangential arms.

Similar numerals of reference indicate like parts in the several views.

Referring to the drawings, 1 represents a cylindrical casing having afixed bottom provided with a central step bearing 2 for the hereinafterdescribed driving shaft of the apparatus, and a cone top 3 to which theinduction and eduction pipes are attached.

1 is the eduction pipe connected to the upper part of the cone top 3 ofthe casing and opening directly into the interior of the same as shown.

5 is the induction pipe also connected to said cone top 3, and having acentral vertical extension 6, which extends down into the main body ofthe casing and dips into the fluid contained therein.

7 is the vertical driving shaft arranged centrally in the casing withits lower end journaled in the aforesaid step bearing 2, while its upperportion turns in a bearing Letters Patent. 7 Patented July 20, 1909.

8 secured to the induction 5 and is provided with a driving pulley 9 orthe like.

10 is a tubular trunk having a central hub and spider by which'it isoperatively connected to the aforesaid driving shaft 7. Said tubulartrunk is of a diameter corresponding to that of the vertical extension 6of the induction pipe and is connected thereto by an annular gland 11,adapted to permit a free rotation of the trunk without leakage of theair at the point of connection. The trunk and gland just described arelocated' a distance below the surface of the fluid with which the mainbody of the casing is fllled,with a view to aid in the prevention of airleakage at the joint between the revolvpipe aforesaid.

12 are hollow arms extending tangentially from the trunk 10, and have aflattened elliptical form as shown in Fig. 4: with a view to afford amaximum cross-sectional area with a minimum amount of impedance to themovement of the arms through the fluid medium in which they work.

13 are suction heads arranged in tangential relation to the circularpath in which they travel, and secured to the outer ends of the hollowarm 12 aforesaid. In the present improvement each of saidsuction headswill comprise a substantially cylindrical outer portion 14, attached toand communicating with a hollow arm 12 aforesaid, and a conical innerportion 15 connected at its wide end with the forward end of theaforesaid outer portion 1%, as shown more particularly in Fig. 3. Withsuch construction, and with the arms 12 moving in a circular path, thefluid in the main casing is forced through the inner conical portions15, of the suction heads to produce a very effective suction at the rearends of said heads to draw the air from the induction pipe, tubulartrunk and hollow tangential arms, and effect the movement of a largebody of air through said parts. 1

16 are a series of fixed radial partitions arranged within the maincasing l and extending from the inner wall of the same to the verticalportion 6 of the induction pipe and to the step bearing 2. Saidpartitions are cut away near their lower ends in man ner shown in Fig.1, to permit the free travel of the aforesaid tangential arms andsuction ing trunk 10 and the stationary induction heads in a circularpath during the actual the passage 18 aforesaid.

19 is a horizontal partition arranged above the series of partitions 16,and preferably of a semi-circular form, and extending from the partition16 adjacent to the supplementary partition 17 to another diametricallyop posite as shown in Fig. 2.

20 are openings in the upper ends of the partitions 16, beneath thehorizontal partition 19-, for the passage of the air from one to theother of the series of subchambers formed by such partitions, and theultimate passage of said air to the eduction pipe 4 aforesaid.

Having thus fully described my said invention what I claim as new anddesire to secure by Letters Patent, is 1-- l. The combination in an airmover, of a fluid containing casing, a revolving trunk arrangedcentrally within said casing, hollow arms extending horizontally fromsaid trunk, suction heads arranged on the outer ends of said arms andcomprising outer cylindrical portions and conical inner portions securedat their wide ends to the forward ends of the outer portions, and meansfor imparting rotation to the hollow trunk, substantially as set forth.

2. The combination in an air mover, of a fluid containing casing, arevolving trunk arranged centrally within said casing, hollow armsextending horizontally from said trunk, suction heads arranged on theouter ends of said arms in tangential relation to the circular path inwhich they travel and comprising outer cylindrical portions and conicalinner portions secured at their wide ends to the forward ends of theouter portions, and means for imparting rotation to the hollow trunk,substantially as set forth.

3. The combination in an air mover, of a fluid containing casing, arevolving trunk arranged centrally within said casing, hollow armsextending horizontally from said trunk and having an oval form incrosssection, suction heads arranged on the outer ends of said arms andcomprising outer cylindrical portions and conical inner portions securedat their wide ends to the forward ends of the outer portions, and meansfor imparting rotation to the hollow trunk, substantially as set forth.

at. The combination in an air mover, of a fluid containing casing, arevolving trunk arranged centrally within said casing, hol low armsextending horizontally from said trunk and having an oval form incrosssection, suction heads arranged at the outer ends of said arms intangential relation to the circular path in which they travel andcomprising outer cylindrical portions and conical. inner portionssecured at their wide ends to the forward ends of the outer por tions,and means for imparting rotation to the hollow trunk, substantially asset forth.

5. The combination in an air mover, of a fluid containing casing havinga closed top and bottom, induction and eduction pipes connected to thetop of said casing, the induction pipe having a vertical extensionarranged centrally in the casing, a vertical driving shaft arrangedcentrally in said casing, a trunk arranged on the lower part of saidshaft below the vertical extension of the induction pipe and connectedthereto by an annular gland, a series of tangential hol low arms carriedby said trunk, suction heads arranged at the outer ends of said arms, aseries of radial partitions extending from the inner walls of the casingto the central vertical extension of the induction pipe, and ahorizontal partition arranged above part of said radial partitions,substantially as set forth.

(3. The combination in an air mover, of a fluid containing casing havinga closed top and bottom, induction and eduction pipes connected to thetop of said casing, the induction pipe having a vertical extensionarranged centrally in the casing, a vertical driving shaft arrangedcentrally in said casing, a trunk arranged on the; lower part of saidshaft below the vertical extension of the induction pipe and connectedthereto by an annular gland, a series of tangential hollow arms carriedby said trunk, suction heads arranged at the outer ends of said arms, aseries of radial partitions extending from the inner walls of the casingto the central vertical extension of the induction pipe, a supplementarypartition arranged adjacent to one of said radial partitions, and a horizontal partition arranged above part of said radial partitions,substantially as forth.

Signed at Chicago, Illinois, this 8th day of February 1909.

AUGUC T MATHIS.

Witnesses:

Rolnan'r Bnnxs, HENRY Mon.

